Especially an integrated VCO phase-locked loop of ADF4351 series with high performance-price ratio, which is convenient for developers to develop and use for the second time. It has a great in parameter design and test. The ADF4351 has an integrated voltage controlled oscillator (VCO) with a fundamental output frequency range of 2200 MHz to 4400 MHz. In addition, with 1/2/4/8/16/32/64 crossover circuits, users can generate RF output frequencies as low as 35 MHz. For applications requiring isolation, the RF output stage can be . The mute function can be controlled by pins or software. At the same time provide auxiliary RF output, and can be turned off when not in use. The ADF4351 is used in conjunction with an external loop filter and external reference frequency to implement an integer-N frequency-locked loop (PLL) frequency synthesizer. Module parameters Module model: ADF4351 Module type: broadband PLL frequency source Power supply voltage: DC-5V Module current: 160mA (MAX); quiescent current 20mA (TYP) normal drive current (155mA) Module communication protocol: SPI Module provides routines: STM32F103RBT6; point frequency, frequency sweep Routine platform: STM32F103X-M3; KEIL5 version source code Module reference frequency: 100MHz; clock can be input externally Reference frequency signal amplitude: 700mVpp(MIN) Frequency stability: 25PPM Phase noise: different frequency phase noise Module output frequency range: 35MHz-4.4GHz Frequency control step: 0.1MHz Frequency sweep step time: 1mS(MIN) Module output power: 7dBm (MAX); different frequency output power is different Module output interface: SMA; 24-hour salt Module output signal: sine wave or square wave Module output channel: 2 differential channelsModule output impedance: 50 ohm matching Signal characteristics of the module: 35MHZ--2.2GHz square wave (fundamental frequency division) 2.2GHZ--4.4GHz sine wave (fundamental wave) Module features: ultra-low phase noise, broadband RF PLL signal generator Module working temperature: 0-75; civil grade Material: PC+Metal colour: As shown Package Contents: 1 x ADF4351 Phase-Locked Loop Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.